As pH of blood decreases, H+ ions increases, which combine the proteins part of hemoglobin, to decrease its ability to bind with:
Correct answer: A. O2
- A. O2
- B. CO2
- C. CO
- D. H2
Explanation
If the pH of blood is lower than normal (normal physiological pH is 7.4), then the haemoglobin does not bind oxygen as well. In other words, the lower the pH, the more Hydrogen ions, the higher the carbon dioxide level and the LESS affinity Hemoglobin has for oxygen (Bohr effect). The opposite is also true: the higher the pH, the lower the H+ ion concentration, the lower the carbon dioxide level, and the GREATER the affinity of haemoglobin for oxygen.
Last updated
About Respiration
The human respiratory system includes the air passages, lungs, alveoli and breathing muscles, while gaseous exchange explains how oxygen enters blood and carbon dioxide leaves it by diffusion. The effects of smoking include damage to cilia and alveoli, reduced gas exchange, chronic bronchitis, emphysema and increased risk of lung cancer.
Practise Respiration
446 free Respiration MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Biology questions like this
Biology is on 6 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
Chest cavity is bounded by ribs and muscles on the sides, while the floor of chest cavity is called:
Booklungs serve the function of respiration in:
Which of the following is not an infection of the lungs/respiratory tract?
The function of respiratory passage, Cilia is to keep the airways clear of:
Haemoglobin carries more oxygen than plasma by: